2] Disk Partitioning – There are two methods/schemes of Disk partitioning

a) MBR Partition Table
b) GUID Partition Table

When a Hard Disk is partitioned with the MBR Partition Table scheme – MBR contains the primary partition entries. Maximum four (4) primary partition or three (3) primary partition and one extended partition can be created. The partition table entries for other secondary partitions are stored in Extended Partition Table. In extended partition, we can create 128 logical partitions.

When a Hard Disk is partitioned with the GUID Partition Table scheme – the Master Boot Record will still contain a partition table, but its only purpose is to indicate the existence of the GUID Table